Fadogia and LJ100 is be a nice stack IMO. I usually take for about 6-8 weeks and then take a break at least half as long. Have never taken it, but I am assuming that the LJ100 is like regular Longjack, I usually take longjack 5/2 like you mention.
Most supps that have Fadogia have around 1200mg of it, (don't need any more). You may want to spread the dosage at first as it can cause some digestive issues, but it goes away in 2 or 3 days.
Have never experienced E2 issues on this stuff, but not very sensitive in that regard.